1222012022100 has 36 divisors (see below), whose sum is σ = 3535688118144. Its totient is φ = 325869872480.

The previous prime is 1222012022087. The next prime is 1222012022117. The reversal of 1222012022100 is 12202102221.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1222012022100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2036686404 + ... + 2036687003.

Almost surely, 2^{1222012022100} is an apocalyptic number.

1222012022100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222012022100 is an abundant number, since it is smaller than the sum of its proper divisors (2313676096044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1222012022100 is a wasteful number, since it uses less digits than its factorization.

1222012022100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4073373424 (or 4073373417 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1222012022100 its reverse (12202102221), we get a palindrome (1234214124321).

The spelling of 1222012022100 in words is "one trillion, two hundred twenty-two billion, twelve million, twenty-two thousand, one hundred".